Air brake



March 6, 1928. 1,661,947

w. R. HOWDON AIR BRAKE Filed April 22. 1927 INVENTOR wnmzsisss nae-#002204 0m Fa;

ATTORNEY Patented Mar. 6, 1928.

UNITED STATES PATENT OFFICE.

WILLIAM R. HOWIDON, OF ANNISTON, ALABAMA.

AIR BRAKE.

Application filed April 22, 1927. Serial No. 185,829.

This invention relates to improvements in air brakes.

More particularly, the present invention relates to a sanding attachment for auto It is a further object of the invention that the attachment will in no way interfere with the operation of the brake valve to which the same may be applied.

Other objects, and objects relating to de. tails of construction, combination and arrangements of parts will hereinafter appear in the detail description to follow. I

The invention is illustrated by way of example in the accompanying drawings, in which: 7

Figure 1 is a top plan view of a brake valve with the present invention applied,

Figure 2 is a view in side elevation of the same,

Figure 3 is a plan View of the rotary valve as modified for the purpose of the present invention, 1

Figure 4 is a similar view of the rotary valve seat, and

Figure 5 is a fragmentary perspective View of a valve and operating handle there for constituting in partthe sanding attachment of the present invention.

Referring to the drawings more particularly in Figures 1 and 2, indicates generally an automatic brake valve, of which 11 is the operating handle, 12 the casing for the rotary valve and 13 the rotary valve seat. The operating handle, as is well known has six positions, namely, release, running, holding, lap, service, and emergency. These positions-are indicated in Figures 1 and 4. In Figure 3, 10 indicates generally therotary valve, and in Figure 4, 11 indicates generally the rotary valve seat.

It should here be noted that certain sanding operations are provided with the operation of the automaticair brake valves. The sand is serviced, however, after the brakes are applied and certain beneficial ircsul ts cannot be obtained as with an operation wherein the sanding of rails takes place pre vious to application oibrakes as is the purpose of the present invention. I

It should also be noted that the usual sanding appliances are used in conjunction with my invention. The present invention deals with the starting andstopping of sanding rails and only attachments and changes in the regular automatic brake valve are necessary,

In applying my invention to a brakevalve of the type shown in. Figures 1 to a inclusive, there is provided a one ,way valve i l preferably of the type shown in Figure This valve is secured in any convenientmanner to the valve 10 as showninFigures l and 2. The one way valve is provided with an operating handle 15 which lies beneath the op erat-ing handlell of the automatic valve 10, when in released position. Stops 16 and 17 are provided for handle 15 to limit the movement thereof in both directions. hen the handle 15 is in a vertical position and against stop 17 the same is open. The valve is fully closed when the handle rests against stop 16. i

Inthe valve 10 I provide an opening or passage 18, and in the valve seat 11 I provide a groove 19 which extends between running'position and service position of the brake handle ll as illustrated to advantage in Figure 4:. I also provide a groove 20 for the emergency position of the operating lever 11. Only a short bridge .21 exists between the grooves19 and' 20, and the grooves preferably are located in the valve seat 11 as shown. The groove 19 communicates with a pipe 22 which is connected to one end of theone way valve 14. Groove 20 communicates with a passage 23 which in turn communicates with a pipe 24. Pipe 24: is connected with the remaining end of the one way valve 14 by pipe 25. Pipe 25 may be extended to the sanding apparatus, and supply air for operating the same in a manner to be hereinafter described.

As shown to advantage in Figure 1, when the brake valve handle 11 is in its released position the valve handle 15 is substantially previous to the application of the bralges then with his hand upon the handle llhe should lift the handle or lever .to. an upright position and against the handle 11,

and; thus open the, oneway yflilvi w 134 one way valve open a rwrll, flow throughpassage 18, groove l9,,nassage, 2,.va1ve to pipe 25, and fromthence to the sanders and opera e the samezin; he m nner,"

The air will continue to flow inithe manner.-

described for operating the, rail] sanding apparatus until the operating handle passes itsservice position, after wh chuthe a-ir .-w;11l change its course and insteadoi' pass ng through the valve l4awill, pass through passage 2 3 and directly touthet rail lpsanding apparatus.

When the operating handle llis returned to its release position thesame willoperate to bringthe handle15. to its-horizontal 1pc.-

sition and close theoneiway valvelh Ell From. the foregoing it is apparent that thesanding of rails-can be accomplished previous to i the. application oi either: service or emergency brakes. in, apositiveand certain manner, andthat suchop erationcan be car:

ried out without interference with the-open? ationo-f thebrake valve, p i

i While I have shownand describedthe preferred application 0:E my invention, to anautomatic brake valve I am well aware. that changesmight. be rmadesin snch application bythosetskilled in the art without departing from the spirit of my invention.

claima v 1, combination. wit-ha brake valve of the? character described, means whereby a rail sandingoperation may be accomplished p yevious to the'application oil brakes by said valveand onlyvafter the latterhas been, actuatedi fa om normally-released position;

2. In; combination! with y an 1 automatic bnake valve otthe character described, a lve adapted oicaus ndingv rails previous to, application oi brakes by said auto-- matiovalvc, saidsecond mentioneduvalve being operableonly after said automatic brake valve has been! actuated from normally released :position, 1 r 3:, In combination with an: automatic brakes valve having} an operating handle, means: adaptedto' operate fjor causing a rail sanding ropenation previous, to; the, brake ap plication position ofsaidilmndle, said imeans being operable onlyaftensaid ihandle has been actuated to set said; Q automatic brake valve! to. running position, v I

may be brought to running service brake and emergency brake; positions means. operable with, the-brake handle whereby a. rail-i sanding operation may be caused previous to the handle assuming either of the brake positions, said means being rendered inoperative aftersaid handle ismoved past the. service position of said automatic brake valve, i n

6. In combination with an automaticbrake valve having an operating handle, means operable with said handle adapted to operate for causing a rail sandingoperation-prev vious to the brake applicatiom position of, said handle, said means-being adaptcd to be rendered inoperative with the brakic handlei assuming its release position. v r y 7. In combination with an automatic; brake; valve having ahandlevwhioh' may be brought to brake positions asecond handle adapter la to beswung bytheihand of an operator upon! the automatic brake handle, andiuneanszasa sociated with the second handle-wvhereby with swinging the same to a certain positiona rail sanding operation may be SQiilllliiQ' operation previous to tllGl automatic: brake valve, handle assuming either of; brake positions. I v

8. In combination with an automatic brake valve having a handle which may be-bnonglit to release andbrake positions a second-harp. dle adapted to be operated by the hnndmt an operator upon .the handleofthc automatic brake valve to cause a rail sandingoperation previous to thebrake valve handlc assuming any of its brake-posi-tionajandsaidsecond handle returned toits nonvoperative position by the-valve handle-when said, valve handle assumes its release position- 9. In combination with an automaticln'ako valve of theicharaoterdescribed, air ail) sands ing control valve normally detained from op eration by the handle of the brake-value when the latter is set to released position and adapted torbe operated whenythe said handle is moved-from the released position of saidv brake valve, said: control Naive being rendered inoperative: when saidz handle is moved past theserviceposition 0t said bnake valve. i I

1O.v In combination with, an automatic brake valve of the character described, a. rail being rendered inoperative when said handle is moved past the service position of said brake valve, and returned to normally ins operative position by said handle when the 10 latter is returned to the released position of 7 said brake valve.

WILLIAM R. HOWDON. 

